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Effects of Insulin Combined with Metformin on Serum Cystatin C, Homocysteine and Maternal and Neonatal Outcomes in Pregnant Women with Gestational Diabetes Mellitus

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Effects of Insulin Combined with Metformin on Serum Cystatin C, Homocysteine and Maternal and Neonatal Outcomes in Pregnant Women with Gestational Diabetes Mellitus EXPERIMENTAL AND THERAPEUTIC MEDICINE 19: 467-472, 2020 Effects of insulin combined with metformin on serum cystatin C, homocysteine and maternal and neonatal outcomes in pregnant women with gestational diabetes mellitus JIZENG ZHENG1, JUAN XU2, YIN ZHANG1 and NAN ZHOU3 1Department of Obstetrics and Gynecology, Liaocheng Third People's Hospital, Liaocheng, Shandong 252000; 2Department of Obstetrics, Tengzhou Central People's Hospital, Tengzhou, Shandong 277500; 3Department of Health Care, Jinan Central Hospital, Jinan, Shandong 250013, P.R. China Received July 5, 2019; Accepted September 2, 2019 DOI: 10.3892/etm.2019.8224 Abstract. Effects of insulin combined with metformin on Introduction serum cystatin C (Cys C), homocysteine (Hcy) and maternal and neonatal outcomes in pregnant women with gestational Gestational diabetes mellitus (GDM) (1,2) is a disease that diabetes mellitus (GDM) were investigated. In total, 80 cases occurs during pregnancy, and its incidence rate has gradually of pregnant women diagnosed with GDM in the Department increased. Lack of pregnancy knowledge, along with unrea- of Obstetrics and Gynecology of Liaocheng Third People's sonable diet, glycemic control and pregnancy weight gain lead Hospital from July 2015 to July 2017 were selected and divided to GDM in pregnant women (3). These are important factors into a study group (42 cases) and a control group (38 cases). in becoming a high-risk pregnant woman. If not controlled The study group was treated with insulin combined with in time, the disease may have a severe impact on mothers metformin, and the control group was treated with insulin. and infants. Fasting blood glucose (FBG) and postprandial blood glucose Most pregnant women with GDM cannot control their after 2 h (2hPG) of the two groups were compared before and blood glucose effectively through diet control and exercise after treatment. Levels of serum Cys C, Hcy, urinary protein therapy (4). Consequently, they are often dependent on drug (UmAlb), postpartum maternal outcomes and adverse reac- therapy to control their blood glucose level. Insulin is often tions during pregnancy were compared in the two groups selected for the treatment of diabetes as it can reduce blood before and after treatment. After treatment, the level of FBG glucose levels (5). However, it has no obvious effect on the and 2hPG in the control group was higher than that in the treatment of insulin resistance in patients with GDM; thus, treatment group (P<0.05). After treatment, the level of serum there are still some deficiencies in its efficacy. Metformin is an Cys C and Hcy in both groups were lower than that before the insulin sensitizer that adjusts glucose metabolism by adjusting treatment, and the level in the study group was lower than that insulin sensitivity (6). This constitutes an important reason for in the control group (P<0.05). The total incidence of neonatal improving insulin sensitivity in vivo. adverse outcomes and the number of adverse pregnancies in Increasing insulin resistance in GDM patients is the GDM patients in the study group were significantly lower than result of increased secretion of progesterone, estrogen and those in the control group (P<0.05). There were no significant other substances in the middle and late stages of gestation, differences in adverse reactions during pregnancy between the resulting in decreased insulin sensitivity, unstable blood two groups (P>0.05). In conclusion, insulin combined with glucose level, and abnormal glucose metabolism and various metformin is more effective than insulin alone in reducing complications (7). Diabetic nephropathy is easy to occur serum Cys C and Hcy levels, with significant effect on the during the treatment of GDM (8). Due to the inconspicuous improvement of maternal and neonatal outcomes. early symptoms, diabetic nephropathy is not easy to detect, and develops to the point of severe damage when identified at late stage. While cystatin C (Cys C) is a sensitive indicator for early diagnosis of damage to glomerular filtration function, it can reflect the damage degree of patients with GDM compli- Correspondence to: Dr Nan Zhou, Department of Health Care, Jinan Central Hospital, 105 Jiefang Road, Jinan, Shandong 250013, cated with renal disease (9). In addition, when the body's P. R. Ch i na blood glucose level is at a high concentration, patients may E-mail: [email protected] lose excessive amounts of fluid (10,11). The level of homo- cysteine (Hcy) also increases, accelerating the pathological Key words: insulin, metformin, serum cystatin C, homocysteine, changes of small blood vessels and aggravating the course maternal and neonatal outcomes of GDM (10,11). Therefore, the monitoring of the two serum factors is conducive to the prevention and timely detection of some related complications. 468 ZHENG et al: INSULIN COMBINED WITH METFORMIN ON Cys C AND Hcy IN GDM Previous findings have shown that insulin combined with Maternal and neonatal outcomes between the two groups metformin have an effect of declining the levels of blood were compared, including maternal delivery methods: sugar (12). However, few studies on the joint treatment of the Cesarean section, preterm delivery and labor induction. two concerning the detection of serum Cys C and Hcy levels The number of newborns with hypoglycemia, macrosomia, in patients with GDM and their effects on mothers and infants neonatal jaundice, and fetal malformation was recorded. are currently available. In the present study, we explored the UmAlb levels of pregnant women in the two groups were effect of the combined therapy of insulin and metformin on compared, special protein immunoturbidimetry was used serum Cys C and Hcy levels, and the maternal and neonatal in the detection. The detection instrument was Beckman outcomes in GDM patients. DXC600 automatic biochemical detector (Beckmen Coulter). The incidence of adverse reactions was compared between Patients and methods the two groups, including nausea, vomiting, hypertension and diarrhea. General data. A total of 80 cases of GDM patients admitted to the department of obstetrics and gynecology of Liaocheng Statistical analysis. In this study, SPSS 20.0 [Boyi zhixun Third People's Hospital (Liaocheng, China) from July 2015 (Beijing) Information Technology Co., Ltd.[ was used for statis- to July 2017 were selected, 42 cases of patients treated with tical analysis of experimental data. Chi-square test was used insulin combined with metformin were included in the study for enumeration data. Mean ± standard deviation was used for group, and 38 cases of patients treated with insulin alone measurement data. The t-test was used for comparison between were included in the control group. There were no significant the two groups, and paired t-test was used for comparison before differences in age, BMI and gestational weeks (P>0.05). and after treatment of the two groups. GraphPad Prism 6 soft- Patients who met one of the diagnostic criteria for GDM ware was used to draw the experimental illustrations. P<0.05 were included in the study: fasting blood glucose (FPG) was considered a statistically significant difference. ≥5.1 mmol/l, blood glucose after 1 h (1hPG) ≥10.0 mmol/l, and postprandial blood glucose after 2 h (2hPG) ≥8.5 mmol/l (13). Results Exclusion criteria were: patients who had gestational diabetes during previous pregnancy; patients with liver and kidney Comparison of general data of the two groups. There were no dysfunction; patients with communication and cognitive significant differences in general data such as age, BMI and dysfunction; patients who did not cooperate with the study gestational weeks (P>0.05) (Table I). requirements. All the patients and their families agreed to participate in Comparison of FBG and 2hPG levels before and after treat- the experiment and signed an informed consent. The present ment in the two groups. The FBG content in the study group study was approved by the Ethics Committee of the Liaocheng and the control group before treatment was 6.75±0.68 and Third People's Hospital. 6.72±0.67 mmol·l-1, and the 2hPG content was 10.34±2.45 and 10.27±2.23 mmol·l-1, respectively. After treatment, the content Therapeutic schedule. Regular exercise and diet management of FBG was 5.13±0.46 and 5.67±0.52 mmol·l-1, respectively. were adopted in both groups. Patients in the control group The 2hPG content was 5.24±2.56 and 6.12±2.67 mmol·l-1, received insulin treatment [import drug registration certificate respectively. There were no significant differences between no. X19990279[96], medicine authorized number: J-70[2]; the study and control groups before treatment (P>0.05), and Novo Nordisk (China) Pharmaceuticals Co., Ltd.], at the dose the levels of FBG and 2hPG in the study group after treatment of 0.2-0.25 U/(kg·day). Patients in the study group received were lower than those in the control group (P<0.05) (Fig. 1). treatment of insulin combined with metformin. The insulin dose was 0.2-0.25 U/(kg·day), and the metformin was given Content of serum Cys C and Hcy of patients in the two groups orally at 0.5 g/time twice a day. The dosage could be increased before and after treatment. Serum Cys C contents in the or decreased according to the patient's blood glucose level, study group and control group before treatment were 1.480.56 and the highest dose could not exceed 3 g/day. The treatment and 1.460.45 mg/l, respectively. The contents of serum Hcy continued until the birth of the newborn. were 14.25 and 14.285.34 µmol/l, respectively. There were no significant differences between the two groups (P>0.05). After Observational indexes. Blood glucose levels of GDM patients treatment, serum Cys C levels in the study group and control in both groups were observed before and after treatment, and group were 0.780.34 and 1.210.25 mg/l, respectively.
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